Over the hill: The cell phone turns 40

April 3, 2013

ERIC RISBERG/File

7of17

Martin Cooper, shown here in 2003, holds a Motorola DynaTAC, a 1973 prototype of the first handheld cellular telephone in San Francisco. 40 years ago he made the first call on a DynaTAC he designed and is thus the father of the cell phone.

ERIC RISBERG/File

7of17

Martin Cooper, shown here in 2003, holds a Motorola DynaTAC, a 1973 prototype of the first handheld cellular telephone in San Francisco. 40 years ago he made the first call on a DynaTAC he designed and is thus the father of the cell phone.